x86,vdso: Use .fault for the vdso text mapping
The old scheme for mapping the vdso text is rather complicated. vdso2c
generates a struct vm_special_mapping and a blank .pages array of the
correct size for each vdso image. Init code in vdso/vma.c populates
the .pages array for each vdso image, and the mapping code selects
the appropriate struct vm_special_mapping.
With .fault, we can use a less roundabout approach: vdso_fault
just returns the appropriate page for the selected vdso image.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
3 files changed
